Crushing-machine.



J. M. SHO'LL.

GRUSHING MACHINE.

nrmoumnrunn FEB. 15. 1908.

Patented se t. 17,1912;

4 SHEETSSHEET 1.

J. M. SHOLL.

GRUSHING MACHINE.

APPLICATION FILED FEB.15, 190s Patented Sept. 17, 1912.

4 SHEETSSHEET 2.

i am 1 In I J. M. SHOLL.

GRUSHING MACHINE,

APPLICATION FILED FEBlfi. 1908.

1,038,794. P n ed Sept. 17,1912.

4 SHEETS-SHEET 3.

V Q/Q/ @V @MMM- J. M. SHOLL.

CRUSHINS MACHINE.

APPLICATION FILED r1112. 15, 1908.

{794 Patented Sept. 17, 11912. v f? 4 SHEETS-SHEET 4.

wr Q. 59 HI! 60 JACOB M. SHOLL, or MILWAUKEE, WISCONSIN.

CRUSHING-MAGHINE.

Specification of Letters Patent.

Patented Sept. 17, 1912.

Application filed February 15, 1908. Serial No. 416,021.

Machines, of which the following is a full,

clear, and exact specification.

My invention relates to crushing machines having gyratory shafts andcrusher heads carried thereon, and particularly to that form of the samein which the upper end of the gyratory shaft is suspended in the hub ofa top support plate or spider and the crushing head is carried in acrushing chamher, the lower end of the shaft being caused to move in asmall circle, thus giving the shaft a gyratory movement. When stones orore is thrown into the crushing chambers of such machines, it is crushedas the head advances toward the wall of the crushing chamber and isallowed to fall as the head recedes until it is reduced sutlicient-ly insize to fall through the opening atthe bottom of the chamber into a.discharge hopper or chute.

The primary object of the invention is to provide an improved form ofcrusher of the class described which shall be simple in construction andeflicient in operation and in which the height of the machine may bereduced, thereby facilitating feeding and at the same time reducing theweight, the initial cost of construction, the cost of transportation,and the cost of the foundation or supporting structure.

A. further object of the invention is to hrovide in a crusher of theclass described improved means by which the various running or exposedparts are protected from wear and from dust.

A. further object is to provide an improved form of adjustable upperbearing for supporting the suspended main gyratory shaft.

- chino and assemble them.

A still further objectof the invention is to provide an improved form ofhopper whereby the spider arms which support the main gyratory shaft maybe protected from wear due to the passing of material to be crushedthrough the hopper, and to facilitate feed- 1H0. v

To the attainment of these ends and in order to accomplish other new anduseful results the invention consists in the features of noveltydescribed in the specification,

pointed out more specifically in the appended claims and shown in theaccompanying drawings.

In the said drawings Figure 1 is a vertical section, partly in elevationof the complete machine. Fig. 9. is an elevation of the complete machinelooking into the discharge spout. In this view a portion of the feedhopper is shown in section to illustrate the construction thereof. Fig.3 a plan section taken on line 33, Fig. l, and shows the relation of thevarious parts which impart the gyratory motion to the main shaft. Inthis view collar 27 is removed. Fig. 4: is a detail view in horizontalsection partly in elevation of a modified form of mecha- "nism' whichmay be adapted for imparting rotary movement to the eccentric ringinstead of the rim-pulley drive shown in Fig.

1. Fig. 5 is a detail view in sectional elevation of the clampingadjusting nut on the upper end of the main gyratory .shaft, on line 5--5of Fig. 6. Fig. \6 is a plan view partly in section'of the parts shownin'Fig.

5. Fig. 7 is an enlarged detail section illustrating the form of threadontthe adjusting nut and the upper end of the main gyratory shaft. Fig.8 is a broken sectional elevation illustrating a modified fofrm of themachine shown in Fig. 1 in which the spider which is used in suspendingthe main gyratory shaft is constructed separately from the upper shellpr crushing chamber. Fig. 9 is a broken view in elevation showing theupper part of the machine constructed according to the modified form.shown in Fig. 8, with the spider supporting the gyratory shaftdetachably connected to the upper shell or crushing chamber. Fig. 10 isa plan View in sect-ion and Fig. 11 a view in elevation of one sectionof thepreferred form of roller bearing cage used to secureanti-friction' bearings for the eccentric driving ring. Figs. 12 and 13are detail sectional views taken through diametrically opposite sides ofthe eccentric driving ring and the rimpulley secured thereto for drivingthe same, the View in Fig. 12 being taken through the ring on the sidehaving a-maximum thickness, while the section in Fig. 13 is taken on theside having the minimum thickness. The adjacent roller bearings areshown in each view in elevation. Fig. 14 is a detail plan view of aportion of the rim pulley secured to the eccentric ring as the partsappear in vertical section in Fig. 13. Fig. 15 is a brokenverticalsectional view partly in elevation illustrating a modified formof the discharge hopper and spout in which said hopper and spout arecarried by the spider which imparts the gyratory motion to the mainshaft.

The top shell or crushing chamber of the machine is indicated by thereference character 10. In the interior of this chamber is the usualform of crushing head 11 which is sleeved on main gyratory shaft 12.This shaft 12 may be supported in its gyratory movement in any desiredor suitable manner as is common in this class of machines. It ispreferred, however, that it be suspended from its upper support and tofurnish this upper bearing and to take the side pressure the spider 10is provided, which is preferably integral with the upper shell orcrushing chamber 10, although in some .of thelarger sizes of machines itmay be found desirable to construct this spider or support separate frnncrushing chamber 10, as illustrated in Figs. 8 and 9 in which thecrushing chamber is indicated by the reference character 13, and thespider by 14. In'the form of these parts illustrated in Figs; 8 and 9,it is necessary that each of the parts be machined in order that theymay fit together properly and in addition 'to the labor involved,retaining bolts '15 must be provided, all of which expense is avoided bythe construction shown in Fig. 1. The crushing head 11 may be secured to'main 'gyratory shaft 12 in any desired manner. It is preferred,however, that the shaft be formed with a uniformly increasing diameterfrom the partdesigned to receive the upper end of the head to the lowerend thereof and the interior of the head be formed to correspond'withthe conical form of the shaft in order that any tendency of the head toturn on the shaft combined with its weight will cause it to settle untilall looseness taken up. If desired, the head may be prevented fromturning on the shaft by a feather or spline inserted between the partsin the usual manner and the head may be held against any tendency torise on the shaft by means of the threaded collars 16 and 17. -.Theupper end of shaft 12 is preferably cylindrical in form and extendsthrough a bearing formed in the hub of the spider 10. 18 is a bushinginserted in this bearing. In order to permit the gyratory movement ofshaft 12, the bearing formed in the bushing 18 is of a graduallyincreasof shaft 12. The lower portion of this nut which is preferablythicker than the upper portion lnorder to form a suitable bearing restsupon a wearing r1ng'20, thus carry- I ing the weight of the shaft andthe crush ing head. The construction of suspension nut 19 is shown indetail in Figs. 5, 6 and 7, from which it will be seen thatthe upperportion of this nut has slotted openings 21 and that it is provided witha tapered sleeve 22 which maybe driven down on it forcing the threadstogether in order to lock it in its adjusted position; As. a detail ofconstructic-n this nut is preferablyformed with a recessor groove 19 onits interior and is threaded only above such groove or recess. Thisconstruction permits the shaft 12 to be raised and lowered by adjustingthis suspension nut which enables the crushing head 11 to be adjusted inrelation to the crushing chamber and the concaves 23, which form theinterior lining thereof. Tap bolts 24 may be used for securing sleeve 22after it is driven ordrawn to its locking position.

.These same bolts may be used to screw into tapped holes l2 when it isdesired to loosen the sleeve from the suspension nut, the lower ends ofthese bolts bearing against the upper surface of the'suspension nut,there being no holes formed therein to correspond with holes 22 in thesleeve. The form of thread known as the acme thread, which isillustrated in Fig. 7, is preferred for use on the suspension nut andshaft but it will be apparent that any thread with tapering sides as forexample U. S. standard V thread which will permit of locking the not onthe shaft in the manner described may be used. There is a distinctadvantage in this use of this improvedform of suspension nut in that bythe manner in which it is locked in position, all looseness of the partsmay be taken up and the threads protected from wear. The lower end ofnut 19, is faced or beveled at an angle such that it will have a surfacebearing on the wearing ring 20 when the shaft is thrown over to theworking angle and as it gyrates the lines of contact proceed around thisface.

The most important feature of the invention relates to the constructionat the lower end of the main gyratory shaft 12 and the means by whichthe gyratory motion is im; parted to the shaft and to the crusher head11 A bearing for the lower end of the shaft is provided in the hub ofthe spider 25. That portion of shaft 12 enterin the lower bean ing, likethat portion described in the upper bearing, is preferably cylindricalin form and is surrounded by bushing 26 which is so vided :t'oi thedischarge of the crushed ma-j ,terial through the spider into thedischarge hopper and discharge spout below. Here tofore in this classofmachines, it has been the common practice to provide discharge means forthe crushed material immediately below the crushing head. The maingyratory shaft has then been lengthened to aconsiderable distance toextend below the discharge means after passing beyond which it has beenjournaled in means for imparting the desired movement to it. All ofthis; has resulted in an undue lengthening of the crushing chamber 10.which latter member is mounted on a lower plate 0r base 27,

which is provided with openings through' .which the arms of the spiderextend. The;

outer extremities of the spider arms are preferably provided with acircumferential rim 25 which is provided with an upwardly extendingflange 25* around its periphery. In the embodiment of the invention,

shown, it will be apparent that while the weight of the main gyratoryshaft 12 and crushing head 11 are suspended from.the

upper hearing, I no provision is made for. carrying the weightof thespider 25 fromv the suspended shaft. Independent means for sustainingthe weight of the spider is.

shown in Fig. 1 consisting of'wea-ring plate 28 mounted in baseplate 27plate 29 similarly mounted in the circumferential rim of the spider andball bearing cage 30.

It will be apparent that any suitable form by means-of the rotatingeccentric ring 31" interposed 'between the outer wall 'of the chamber 10together.

upper shell or crushing chamber and the upwardly extendingcircumferential flange 25 of the spider. Rotation is preferably impartedto eccentric ring 31 by means of rimpulley 32, which may be made inhalves and bolted together in the usual way to facilitate removal forinspection. The lower outer edge of rim-pulley 32 is provided with aflanged surface 32 which is carriedon suitable supporting rollers 33.This rim-pulley is also provided with an upper bearing sur-- face 32adapted to coiiperate with suitable rollers 34 for preventing upwardmovement. 35 is a spindle which may be screw threaded into lower basemember 27 or secured thereto in any desired manner for supporting roller33.

36 is a form of-shield for roller 33 which may be formed integral withbase member 27 as illustrated. I

37 is a flange secured in any desired mannerto upper shell or crushingchamber 10 and designed as a protective covering for the eccentric ring31 and its bearings. This shield may be formed in sections asillustrated in Fig. 2, portions of which, as 37, may be hinged to admitof their being raised to permit inspection of the eccentric ring and itsbearings, to permit lubrication of these parts and also topermit accessto the nuts of bolts 38 which are used in securing v the lower plate orbase 27 and the crushing A portion of shield member 37 may also beformed as a covering and a support for rollers 34 adapted to take the iward thrust of rim-pulley 32 as illustrate at 37", Figs. 1 and 2. Inorder to furnish a suitable bearing, as well as anti-friction meansbetween -eccentric ring 31 and its cooperating parts on crushing chamber10 and spider 25, a bushing 39 may be provided in flange 25 and a sleeve40 furnishes a similar; bearing around the lower edge of the crushingchamber. When spider flange 25 and crushing chamber 10 are made ofsuitable material for bearings, bushing 39 and sleeve 40 may be omittedas shown in Fig. 4;.

While it will be apparent that the desired gyratory movement wouldbeimparted to spider 25 and to shaftl2 by inserting eccentric ring 31between the bearings described the cylindrical rollers 41 are journaledbetween members 42, held in position by suitable retaining members 43.It is common inflbearings of this description to construct them in onecontinuous circumferential member and such construction may be used 1here. but it is preferred that these bearings be divided into a numberof sections, as illustrated, which makes them much more convenient inassembling or in removing or replacing broken or worn portions. In orderto provide against wear due to the centrifugal action of these hearingsit is preferred that rollers 44 be provided at the ends of each section,which will reduce the friction of supporting members/42.

Base member 27 is preferably provided around its outer edge with anupwardly extending flange 27*, near the base of which a groove27 isformed. This flange provides a protection for the bearings and thegroove furnishes a. means for the collection of waste lubricating oil. v

As the material introduced into the machine is crushed between head 11and concaves 23 and falls downwardly, it will pass between the radiatingmembers of spider 25 and portions of it will strike the arms of .thespider, which constant action wears these parts greatly. To provideagainst such Wear, shields 45 are secured over the top surfaces of thesespider arms. As a fur ther means for preventing material from reachingunprotected parts of the spider arms and for preventing dust fromentering the bearings for operating and supporting the spider shields 46are secured near the lower edge of crushing chamber 10 and to theseshields other shields 47, preferably of flexible material as cloth andthe like, are secured and are adapted to extend downwardly and close theopening through which the spider arms extend. These flexible shields ofcourse may be made to surround very closely the spider arms and therebyeffectually prevent dust and particles of the crushed material fromentering the bearings. A suitable hopper or receptacle is secured to thebottom member 27 or such hopper may be .formed integral therewith. Asillustrated in Figs. 1 and 2 this hopper, indicated by referencecharacter 48, is formed independently of base plate 27and securedthereto by suitable retaining bolts 49. The spout 48 is formed integralwith the hopper although it will be apparent that it may be formedseparately and secured to it in any desired manner. It is found that theconstant action of the material coming from the crushing chamber has awearing effect upon the hopper, which after a time makes it. necessaryto replace the same. To avoid such wear, the hopper48 instead of beingconstructed on a steep incline toward the spout has its exposed surfacecorrugated in the manner illustrated in the sectional view in Fig. 1, orthe incline of the surface may be made very slight which constructioncauses portions of the material to lodge on the surface thus formed inthe hopper in a manner thatiwill be apparent,

so that the crushed material as it drops into the hopper instead ofstriking thelsurface of the hopper wears against other materialpreviously deposited;

In Fig. 15 a modified form of hopper is the spider and as it is carriedby the spider instead of being secured to the base of the machine, asshown in Figs. 1- and 2, the

'gyratory movement of the spider is imparted to the hopper, whichmovement facilitates the passage of the crushed material through thehopper and the discharge spout, thus making it possible to construct thehopper and the spout with a much less incline than when constructed asshown in Figs. 1 and 2. In said modification the .70 shown, whichconstruction, 1f followed, per-.

hopper is-indicated by the reference character 50 and the spout by 50*.It may be attached to the spider in any desired'manner,

although specific means for securing the parts together is notillustrated in the drawing, yet it will be apparent that the same bolts,as bolts 51, which are used for securing shields 45 to the arms of thespider,

may be employed forvsecuring the hopper thereto. If desired, this hoppermay be cast integral with said spider. In this modification the basemember. 52 need not differ from the form illustrated in Figs. 1 and 2,since the base 27 may readily be used in conjunction with this modifiedform of hopper.

In Fig. 4 is shown a modified form'of means which may be employed indriving the eccentric ring 31, consisting of a circular ring or facegear 53 meshing with bevel pinion 54 on horizontal driving shaft 55.Shaft 55 may be driven by any suitable means, as driving pulley 56. Thismeans of driving may under some conditions be found more convenient incommunicating power to the machine and when employed an extension 57 maybe formed integral with base plate 27 and the shaft 55, and its bearin'g58 secured to this extension in any desired manner.

The concaves or plates 23 which line the interior of the crushingchamber and cooperate with the crushing head are usually made to comelevel with the crushing chamber at the top and are overlapped by thehopper or by the rim of the spider which supports the main gyratoryshaft at its upper end. When thus constructed if the concaves vary inthickness, a ledge may be formed by the thicker ones bywhich largeparticles of material entering the crushing chamber lodge and in thismanner obstruct the feed. Again these concaves are sometimes made ofmaterial that expands until it comes in contact with the spider orhopper and may cause breakage. As shown in tinuation of the inclined surace of the re- 1 ceiving hopper '59, thus securln a practicallysmoother, inclined surface for feeding the material into the crushingchamber.

Receiving hopper 59 rests upon the top of the crushing chamber and maybe formed in a plurality of sections and bolted together as illustratedmore particularly in Fig. 9. It is the common practice to make theinclinationof feed hoppers in machines of this class the same in allpoints of its circumference. Since the arms of the spider which supportthe gyratory shaft at its upper end, rise above the inclined surface ofthe hopper, material which is being fed into the crushing chamber lodgesagainst the spider arms, which results in. obstructing the feed to anextent. The improved mannor of constructing the sections of the hopperadjacent the spider arms as illustrated in Figs. 1, 2, 8 and 9 avoidsanysuch obstructlon since the surface 59 of the hopper forms a shedpreventing the material from striking the spider arms and it will beapparent that the elevated surfaces 59- may be formed by separate piecessecured to a hopper of the usualconstruction. 'To pro-- tect the spiderarmsagainst wear from material dropping upon'them from above, theyareprovided with the usual shields 60 and secured to the arms in anydesired manner, as by bolts 61.

While rim-pulley 32 may be formed integral with eccentric ring 31 orsecured thereto in any suitable manner, the formv of construction shownin detail in Figs. 1, and 12 to 141, is preferred. In this constructionthe upper edge of the eccentric ring is formed 'of uniform thicknessthroughout and is formed eccentric only on that portion which cooperateswith the bearings on the gyratory spider. TlllS upper concentric portionof the ring furnishes the means for securing'the concentric rimpulleythereto. The parts may be secured together by the tap bolts 62, one ormore of which may be used in locking keys or pins 63, as illustrated inFigs. 1, 13- and 14,

for the purpose of firmly securing the parts spider in which the lowerend of said gymtogether.

In order that the invention might be fully understood by those skilledin the art, the details of the foregoing embodiment thereof have beenthus fully described, but 7 a What I claim as new and desire to secureby Letters Patent is.-

1. In a machine of the class described in combination, a crushingchamber, a crushing head, a gyratory shaft, a spider adapted to furnishsuspension means for said shaft adjacent the upper extremity thereof andadaptedv to permit a gyratory movement of the shaft, a spider into whichthe lower end of the shaft is journaled, the said spider being providedwith members extending beyond the walls of the chamber, and meansadapted to impart a gyratory movement to the last said spider inrelation to the crush mg chamber, said means comprising an eccentricring interposed between the said spider and the crushing chamber.

2. In a machine of the class described in combination, a main crushingchamber, a stationary spider carried by the said chamber at its upperextremity, a main gyratory shaft provided with a crushing head journaledin said spider and suspended therefrom to permit a gyratory movement ofsaid shaft in relation to the spider and the crush ing chamber, a spiderat the lower extremity of the' gyratory shaft and connected therewith,said spider being.mounted on suitable bearings whereby it is susceptibleof a gyrat'ory movement and having portions thereof extending beyond theouter walls of the crushing chamber, an eccentric ring interposedbetween the said outer portions of the spider and the chamber, anddriving means for imparting a rotary movement to "said eccentric ringwhereby the said spider and the gyratory shaft are causedto gyrate inrelation to the crushing chamber.

- 3; In a machineof the class described in combination, a crushingchamber, a main the crushing chamber, a suspension bearing in saidspideradapted to carry the upper end of the gyratory shaft, a spider atthe lower extremity of the shaftlan'd connected therewith, arms on saidspider extending beyond the outer walls of the chamber through openingsin the walls of the chamber, and means on the exterior of the chamherfor imparting agyratory movement to the spider, said means comprising anupwardly extending flange. around the periphery of the spider, and aneccentric rin mounted to rot-ate between said flange an a suitablebearing surface fixed in relation to the crushing chamber;

4. In a machine of the class describe/din combination, a crushingchamber, a spider fixed to said'chamber, a main gyratory shaft suspendedfrom said spider, a non-rotating an eccentric ring inter-- posed betweent e splder and a sultable ing relative movement between said lastmentioned spider and the crushing chamber, said means comprising aneccentric ring interposed between the spider and a suitable bearingsurface in fixed relation to the chamber, and means for impartingmovement to said eccentric ring comprising a concentric rim-pulleysecured thereto.

6. In a machine of the class described in combination, a crushingchamber, a main gyratory shaft having one end thereof journaled in fixedrelation to said chamber but adapted to have a gyratory movement in suchfixed bearing, a movable spider into which the other end of said shaftis journaled, means for imparting a gyratory movement'to the last saidspidef, a bearing adapted to carry the weight of the'movable spider,said bearing comprising plates secured to the spider and to a memberfixed to the crushing chamber, and a ball bearing cage between saidplates and a flexible shield cooperating with the wall of the chamberand the spider whereby the dust from the crushing chamber may beexcluded, from the bearing.

7. In a machine of the class described in combination, a crushingchamber, a main gyratory shaft on the interior of the chamber, a spidermovably mounted in relation to the chamber for imparting gyratorymovement to the shaft, a flange on the periphery of the spider extendingaround the outer wall of the chamber, an eccentric ring interposedbetween the flange and the outer wall of the chamber, and anti-frictionmeans adapted to take the thrust between said-eccentric ring, saidflange and the wall of' the chamber comprising a plurality of rollerbearings, i

" 8. In a machine of the class described in combination, a crushingchamber, a main gyratory shaft a spider secured to the gyend of saidshaft and having a porof the chamber, an eccentric ring interposedbetween the spider and a suitable bearing surface in fixed relation tothe'chamber, a rim-pulley secured to said eccentric ring andanti-friction means-for supporting said rim-pulley comprising bear ngsurfaces adapted to support said rim pulley against both upward anddownward movement, and a plurality of anti-friction rollers rotatablyextremity of the crushing chamber by abearing' in fixed relation to saidchamber but adapted to permit a gyratory movement of the lower end ofsaid shaft, a movable spider connected with the lower end of i saidshaft and having the arms thereof extending outwardly through openingsformed in the walls formed by the chamber and its base, said spiderbeing formed with open spaces between the arms thereof through whichmaterial from the crushing chamber'may passyineans for. imparting agyratory movement to said spider, and a discharge hopper and spoutbelowthe said spider.

10. In a machine of the class described in combination, a crushingchamber, a main gyratory shaft suspended from the upper end of saidchamber, means for imparting a gyratory movement to the lower end ofsaid shaft comprising a spider having a plurality of radiating armsextending beyond the outer walls of the chamber, a base plate adapted tosupport the said crushing chamber and to form a continuation of thewalls thereof, there being openings formed in the walls of the chamberand the plate through which the radiating arms of the said spider pass,means on the exterior of the walls formed by the chamber and the basefor imparting gyratory movement to the spider,

and an upwardly extending flange around the outer periphery of the basewhereby protective means for the mechanism operating the" spider issecured.

11; In a machine of the class described in combination, a main crushingchamber, a gyratory shaft, a spider connected with the lower end of saidshaft, means for imparting a gyratory movement to said spider, a baseadapted to support said crushing chamber, the walls thereof beingadapted to form a continuation of the walls of the crushing chamber, abearing surface formed on the said base adapted to support the saidmovable spider, an upwardly extending flange around the periphery of thebase adapted to furnish a shield to the said spider bearing and a groovearound the periphery of the base adjacent the said flange adapted .tofurnish a receptacle for waste lubricants.

' 12. In a machine of the class described in combination, a crushingchamber, a crushing head, a main gyratory shaft carrying said crushinghead, a spider in fixed relation'to said chamber adjacent the upper sidethereof and extending beyond the'upper extremities of the walls of thechamber, and a receiving hopper at the upper extremities of the walls ofthe chamber and being provided with elevated portions in its uppersurface opposite the arms of the spider whereby material fedinto thehopper is deflccted and passes into the chamber Without striking thespider arms.

13. In a machine of the class described in combination, a crushingchamber, a crushing head, a main gyratory shaft supporting said crushinghead, a'spider secured to the walls'of the crushing chamber adjacentthe' upper extremities thereof adapted to furnish a'bearing for the maingyrating shaft, and a hopper at the upper extremities of the walls ofthe chamber, said hopper comprising a plurality of sections, and theupper surfaces of said sections adjacent the spider arms being formed toshed incoming material into the chamber without contacting with thespider arms.

14. In a machine of the class described in combination, a main gyratoryshaft, a crushing chamber, a spider carried by the crushing chamber. andadapted to furnish suspension means for said shaft, a hearing or seat onsaid spider adapted to cooperate with an enlargement or collar on saidshaft, and an adjustable collar on said shaft comprising a sleeveprovided with a threaded inner portion adapted to correspond with asimilar threaded portion on the shaft and being provided with athickened lower bearing surface adapted to cooperate with'the seat orbearing on the spider, therebeing longi tudinal slots through the wallsof the sleeve intersecting the threads, a collar ada ted to be insertedover the slotted and threa ed portion of said sleeve, there bein taperedsurfaces whereby the forcing of the collar over the sleeve locks thesame in position on the shaft, and means for locking the said collar andthe sleeve together. a

In testimony whereof I have signed my

